Basalt Deltas

For the mission in Minecraft Dungeons, see MCD:Basalt Deltas.

Basalt Deltas

Structures	Nether Fortress
Features	Glowstone blob Lava sea Delta Basalt columns Blob
Blocks	Basalt Blackstone Magma Block Lava
Climate
Temperature	2.0
Downfall	0.0
Precipitation	No
Colors
Fog color	#685F70
Grass color	#BFB755
Foliage color	#AEA42A
Dry foliage color	#A38046
Water color	#3F76E4
Water fog color	#050533‌[JE only]  #423E42‌[BE only]
Water fog distance	15‌[BE only]
Vibrant Visuals
Atmospherics	Basalt Deltas
Lighting	Nether
Volumetric fog	Default
Color grading	Default

The basalt deltas are a volcanic biome found in the Nether.

Description

The basalt deltas is the second rarest Nether biome, making up around 16% of the Nether by volume, and can generate next to any other Nether biome except for the crimson forest.

The rough and jagged terrain of basalt deltas is composed largely of basalt and blackstone and features numerous deltas, shallow pools of lava, and magma blocks, typically reaching depths of 1 to 3 blocks. The biome's fog is a dull lilac color, and ambient ash particles float through the air. Archipelagos with islands of different sizes can be found around the lava seas nearby. On the ceiling, glowstone blobs generate as usual. Both brown and red mushrooms still grow in this biome on top of the basalt blocks.

Nether fortresses and ruined portals can be found here. Nether quartz ore, Nether gold ore, and the rare ancient debris generate underground, but are more difficult to obtain due to the abundance of deltas and lava seas. Ore also spawns more frequently to compensate for the significantly reduced amount of netherrack in the biome. Bastion remnants are not present, making basalt deltas the only Nether biome to not feature them.

Magma cubes have a higher spawn rate in this biome than in any other biome. Occasionally, a ghast can be spotted. Like in all Nether biomes, striders wander the lava lakes, and sometimes spawn trapped in the countless deltas.

Mobs

The following mobs naturally spawn here:

In Java Edition

Mob	Spawn weight	Group size
Monster category
Ghast[note 1]	40⁄140	1 (Max 1)
Magma Cube	100⁄140	2–5
Creature category
Strider[note 2]	1	2–4

{ "hasNotes": true, "notes": { "Ghast": "Only 5% of spawn attempts succeed. Additionally, Ghast pack spawn is hard capped at 1.", "Strider": "Adult striders have a 3.3% chance to spawn being ridden by a zombified piglin holding a warped fungus on a stick." }, "1": { "totalWeight": 140, "mobs": [ { "note": "Only 5% of spawn attempts succeed. Additionally, Ghast pack spawn is hard capped at 1.", "mob": "Ghast", "weight": 40, "notename": "Ghast", "size": "1 (Max 1)" }, { "size": "2-5", "mob": "Magma Cube", "weight": 100 } ], "category": "monster" }, "2": { "totalWeight": 60, "mobs": [ { "note": "Adult striders have a 3.3% chance to spawn being ridden by a zombified piglin holding a warped fungus on a stick.", "mob": "Strider", "weight": 60, "notename": "Strider", "size": "2-4" } ], "category": "creature" } }

In Bedrock Edition

Mob	Spawn weight	Group size
Monster category
Magma Cube	100	2–5
Ghast	40	1
Creature category
Strider[note 1]	1	2–4

{ "hasNotes": true, "notes": { "Strider": "Adult striders have a 3.3% chance to spawn with a saddle. They are supposed to spawn with a zombified piglin with a warped fungus on a stick but they don’t due to <span class=\"bug plainlinks\" data-id=\"MCPE-236161\">[[Mojira:MCPE-236161|MCPE-236161]]</span>." }, "1": { "totalWeight": 140, "mobs": [ { "size": "2-5", "mob": "Magma Cube", "weight": 100 }, { "size": "1", "mob": "Ghast", "weight": 40 } ], "category": "monster" }, "2": { "totalWeight": 20, "mobs": [ { "note": "Adult striders have a 3.3% chance to spawn with a saddle. They are supposed to spawn with a zombified piglin with a warped fungus on a stick but they don’t due to <span class=\"bug plainlinks\" data-id=\"MCPE-236161\">[[Mojira:MCPE-236161|MCPE-236161]]</span>.", "mob": "Strider", "weight": 20, "notename": "Strider", "size": "2-4" } ], "category": "creature" } }

Sounds

Music

These music tracks play while the player is in the basalt deltas:

Ambience

Nether ambience plays while the player is in the Nether.

Data values

ID

Java Edition:

Name	Identifier	Numeric ID	Translation key
Basalt Deltas	basalt_deltas	173	biome.minecraft.basalt_deltas

Bedrock Edition:

Name	Identifier	Numeric ID
[No displayed name]	basalt_deltas	181

Biome definition

{
  "attributes": {
    "minecraft:audio/ambient_sounds": {
      "additions": {
        "sound": "minecraft:ambient.basalt_deltas.additions",
        "tick_chance": 0.0111
      },
      "loop": "minecraft:ambient.basalt_deltas.loop",
      "mood": {
        "block_search_extent": 8,
        "offset": 2.0,
        "sound": "minecraft:ambient.basalt_deltas.mood",
        "tick_delay": 6000
      }
    },
    "minecraft:audio/background_music": {
      "default": {
        "max_delay": 24000,
        "min_delay": 12000,
        "sound": "minecraft:music.nether.basalt_deltas"
      }
    },
    "minecraft:gameplay/natural_mob_spawns": {
      "argument": {
        "spawn_costs": {},
        "spawns_by_category": {
          "creature": [
            {
              "type": "minecraft:strider",
              "count": {
                "type": "minecraft:uniform",
                "max_inclusive": 2,
                "min_inclusive": 1
              },
              "weight": 60
            }
          ],
          "monster": [
            {
              "type": "minecraft:ghast",
              "count": 1,
              "weight": 40
            },
            {
              "type": "minecraft:magma_cube",
              "count": {
                "type": "minecraft:uniform",
                "max_inclusive": 5,
                "min_inclusive": 2
              },
              "weight": 100
            }
          ]
        }
      },
      "modifier": "overlay"
    },
    "minecraft:visual/ambient_particles": {
      "argument": [
        {
          "particle": {
            "type": "minecraft:white_ash"
          },
          "probability": 0.118093334
        }
      ],
      "modifier": "append"
    },
    "minecraft:visual/fog_color": "#685f70"
  },
  "carvers": "minecraft:nether_cave",
  "downfall": 0.0,
  "effects": {
    "water_color": "#3f76e4"
  },
  "features": [
    [],
    [],
    [],
    [],
    [
      "minecraft:delta",
      "minecraft:small_basalt_columns",
      "minecraft:large_basalt_columns"
    ],
    [],
    [],
    [
      "minecraft:basalt_blobs",
      "minecraft:blackstone_blobs",
      "minecraft:spring_delta",
      "minecraft:patch_fire",
      "minecraft:patch_soul_fire",
      "minecraft:glowstone_extra",
      "minecraft:glowstone",
      "minecraft:brown_mushroom_nether",
      "minecraft:red_mushroom_nether",
      "minecraft:ore_magma",
      "minecraft:spring_closed_double",
      "minecraft:ore_gold_deltas",
      "minecraft:ore_quartz_deltas",
      "minecraft:ore_ancient_debris_large",
      "minecraft:ore_debris_small"
    ]
  ],
  "has_precipitation": false,
  "temperature": 2.0
}

Achievements

Icon		Achievement	In-game description	Actual requirements (if different)	Gamerscore earned	Trophy type (PS)
PS4	Other
		Adventuring Time	Discover 17 biomes.	Visit any 17 biomes. Does not have to be in a single world.	40	Silver
		Hot tourist destination	Visit all Nether biomes	Note: Can be completed if the player visits the biomes in different worlds.	30	Silver

Advancements

Icon	Advancement	In-game description	Actual requirements (if different)
	Hot Tourist Destinations	Explore all Nether biomes	Visit all of the 5 following biomes: Basalt Deltas Crimson Forest Nether Wastes Soul Sand Valley Warped Forest The advancement is only for Nether biomes. Other biomes may also be visited, but are ignored for this advancement.

History

Java Edition

Bedrock Edition

Data history

Issues

Issues relating to "Basalt Deltas" are maintained on the bug tracker. Issues should be reported and viewed there.

Trivia

• Basalt deltas have no unique mood-based ambient sounds in dark areas and instead borrow those of the Nether wastes.
• According to Felix Jones, the basalt deltas biome has a subtle Easter egg that has not yet been found by anyone.^[1]
• Much of the ambience in the basalt deltas resembles the clicking of a Geiger counter, used to measure radioactivity.
  • During the ambience creation process, Brandon Pearce provided the keyword "radiation" to audio director Samuel Åberg,^[2] which may explain its purpose.
• In Bedrock Edition, the basalt delta is the only nether biome that doesn't have a red water tint.

Gallery

Screenshots

• 
  Typical view of the basalt deltas biome
• 
  A Nether fortress in basalt deltas
• 
  A valley within the deltas
• 
  A ruined portal in basalt deltas
• 
  The border of basalt deltas and a warped forest
• 
  Another view of basalt deltas
• 
  Magma cubes in the basalt deltas
• 
  Basalt columns in the lava sea
• 
  Basalt columns in the air and on the ground
• 
  Small pieces of basalt and blackstone floating above the lava sea
• 
  A bastion remnant next to basalt deltas
• 
  Blackstone in basalt deltas
• 
  A basalt deltas single biome world in the Overworld

Historical screenshots

• 
  A basalt deltas single biome world before 1.18

Mojang screenshots

• 
  Some blocks placed in a basalt deltas
• 
  Fog in a basalt deltas
• 
  Terrain in a basalt deltas
• 
  Kai in a basalt delta holding shield with a banner and wearing trimmed armor
• 
  A Basalt Delta as it appears in Minecraft Dungeons

References

External links

• Around the Block: Basalt Deltas – Minecraft.net on August 13, 2020